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标题: a PS question, please instruct how to solve it [打印本页]

作者: andrewcan 时间: 2002-10-29 04:49 标题: a PS question, please instruct how to solve it

The standard deviation of a certain set of data is 4. If 12 is 1.5 standard deviations away from the mean, which of the following values could be the mean of the set of data?

A. 6
B. 16
C. 8
D. 14
E. 10

作者: spry 时间: 2002-10-29 07:09

sd=4
|12-mean|=1.5*sd=1.5*4=6 =>mean=6 or 18.

[此贴子已经被spry于2002-10-29 7:09:38编辑过]

作者: andrewcan 时间: 2002-10-29 08:38

Thanks! It definately seems simple to you!
BTW, the quotation is impressive!

作者: spry 时间: 2002-10-29 09:13

hehe, thanks, and you are welcome.

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